Compounds that are difficult to synthesize and/or easy to decompose in ambient conditions may show interesting properties.
For example, C-C single bond is usually rigid and robust, and its elongation beyond 1.8 Å has been considered impossible .
On the other hand, based on "intramolecular core-shell structure," we succeeded in the first preparation of the compounds with a C-C single bond beyond 1.8 Å, which has been regarded as a boundary between bonded and non-bonded states.
In addition, we also discovered that such a long and weak C-C single bond has a unique "flexibility" that can expand and contract upon slight external stimuli.
Now, I am focusing on not only chemical bonds but also organic π-conjugated systems to elucidate unique chemical phenomena in extreme structures through experimental and theoretical studies.